Weft-controlled loom-stopping mechanism



June 269 .l

V. H. JENNINGS ET AL v WEFT GONTROLLEDLOOM STOPPING MECHANISM Filed July 2, 1925 2 Sheets-Sheet, 1

June 26, '1928.

V. H. JENIMNGS ET AL wFT coNTRoLLED Loom s'roPPING MECHANISM Filed July 2, 192e A2 sheets-sheet 2 129 EE E7 E150 .'feeler i4,Y shown as of the usual sideslip Patented June Z6, 1928.

, .UNTED STATES VICTOR H. yJnrnrrrres Ann HERBERT n. WATSON, .or w'eaor'srna. MASSACHUSETTS,

n Assrenons To CROMPTON a KNOWLES LOOM wol-nrs, OF WORCESTER, MASSACHU- snTTs, A CORPORATION OF MASSACHUSETTS. f

WEFT-CONTROLLED LOOlVl-STQPPING TvECHANISM.

Appncationiled July 2, 1926. serial No. 120.227.v i

This invention relates to means for automatically stopping ainulti-shuttle loom upon substantial exhaustion of weft or iilling in either shuttle. The invention is more par ticularly designed for application to a loom in which-two kdrop boxes are provided at one side. of the loom and a single box at the other side of the loom. Itis the general object of our invention to provide weftcontrolied means for stopping the loom with the substantially ex* hausted shuttle at the single box side of the loom, in which position the shuttle may be easily removed and replaced.

.A further object is to provide improved devices forpreservingan indication of substantial weft exhaustion until the return of the indicated shuttle, in the event ot a shuttle change immediatelyY after indication.

Our invention further relates to arrangements and combinations of parts which will be hereinafter describedand more particulai-li7 pointed out in the appended claims.

A preferred form of the invention is sho-wn in the dra-wings in which Fig.; 1 is a plan view, partly in-section, of our improved loom stopping mechanism;

Fig. 2 is a similar view, but showing the parts in adi'erent position;

Fig. 3 is a sectional side elevation. Itaken substantially along the line `3 3 in Fig. 1;

.Fig 4 isa similar View. but taken along the line 4-4 invFig. 2:

Fig. .5 is a detail sectional Jfront elevation, taken along the line 5,-5 in Fig. 2;

Fig. 6 is a perspective view of one of the indicating blocks or slides: and

Fig. 7 is a diagrammatic view. indicating `the control .of certain parts from the drop box mechanism. l l

eferring to the drawings, I have shown a. portion of a loom frame 10 having' the usual shipper'shaft 11, shipper handle 12, `and. knock-oit lever 13 mounted thereon. These parts are formed and ,connected in the usual manner. as shown for instance in the patent to,McGuine ss. -l\lo. 1533.644. issued June 28,

` 1927and in themselves iorm no part of my present invention. l

Each shuttle S supportsr a bobbin B which is engaged .bv a weft detecting member or type. yweit detector 14 isslidably mounted a stand 15 adjustably secured on bracket'l fastened to the Yfront of the loom frame 10. I y

The stand 15 is provided with a cross slide 17 which remains in the normal position shown in Fig. 1 so' long as the detector 14 engages a bobbin Bhaving a sufficient sup'- ply of wett thereon. lVhen the weft becomes substantially exhausted, as indicated on the bobbin 4Bin 2, the detecting` member 14 slips alongvthe barrel of the bobbin B. to-

ward the tip, carrying with it the slide 17 and also an indicating member 18 connected thereto, the function oi which will be hereinafter explained. i

A. stand 20 issecured to the loom frame 10 and is provided with ribs or guide-ways 521 for a slide 22. A stud 23 extends through a slot 24 3) `in the slide 22 and acts as a pivot for the slide, while at the same time permitting sliding movement thereof.

The slide 22 has a notch or recess 25 (Fig. 1) which receives one end of a lever 26 piv'oted at 27 on a stand 20 and engaging the knock-off lever 13. llVhen the slide 22 is pushed forward, the knock-ofi" lever 13 is l pushed rearward. releasing the shipper lever 12. and causing the loom to'come *to rest. l

In its rear portion, the slide 22 is provided with transversely extending slots or guide-ways 27 and 28 tor upper and lower indicating.;` blocks 30 and 31. lhen the slide 2Q is in the position indicated in Figs. 3 and 5, the upper indicating block 30 is aligned with lthe reversed upper end 18a of the indicating' member 18 which is slidable in a transverse opening in vthe stand 20. n 'n The normal positionof the blocky 30 is at the extreme left-,- corresponding to the position of the block 31 in Fig. 5, but if the indi` eating` member 18 is moved to theright by l the detector 14, as shown in' Fig. 2, thed block 30 and 31 is indicated in Fig. 6. fromv which it appears that each bloclr has-a wide portion .at one end and a narrow portion at the other vend and that a slot 32 is provided on' the under side of each narrow portion.v A stud 33 is also provided on top of each block. y

The slide 22 is positioned vertically by a lifter rod 35 (Fig. 3) having a forwardly offset head 36 underlying a shoulder 37 (Fig. 5) at the side of the slide 22.

The lifter rod 35 may be actuated in any convenient manner from the drop box or pattern mechanism of the loom and we have indicated in Fig. 7 one such connection, comprising a cord 38 connected at one end to the drop boxes 39 and extending around a guidepulley 40 to a bell-crank 41 which in turn is connected to the lifter rod 35.

An actuating member 43 (Fig. 3) is mounted upon a fixed pivot 44 and is connected by a link 45 to a lever 46 which is raised by a cam (not shown) on the bottom shaft of the loom once for every two picks of the loom.

' The actuating member 43 is recessed at 47 so that said member will engage only one of the slides 30 or 31 at the same time. The actuating member 43 may engage the block 30 when the slide 22 is in lowered position and may engage the block 31 when the slide is in raised position. The range of movement of the actuating member 43 is limited, so that it will not engage the block 30 or 31 in the narrow portion thereof but will only engage a block when it is moved to the right to the position of the block 30 in Fig. 5, in which event it will engage the wide end portion of the block and will thus force the slide 22 forward, swinging the lever 2G and operating throughthe knock-off lever 13 to stop the loom.

Light springs (Fig. 2) normally hold the blocks 30 and 31 in their left hand position unless moved therefrom by the indicating. member 18. When a block is moved to the right by the indicating member, the notch 32 of the block will engage the right hand guide or rib 21 of the stand 20, thus retaining the block in right hand or operative position until the slide 22 approaches its extreme forward position, at which point the projecting end of the block 30 or 31 engages a cam-lug 51 on the stand 20, which raises the block so that it is released and will be returned to its inoperative position by its spring 50. l

Having described the details of construction ofv our loom stopping mechanism, the method of operation thereof will be readily understood.V Under normal operating conditions, both indicating blocks 30 and 31 remain in their left hand positions, as viewed in Fig. 1,- and the actuating member 43 can move freely forward without env If the'bobbin in the shuttle corresponding to the upper drop box 39 becomes substantially exhausted, the block 30 will be moved to the operative posip tion indicated in Fig. 5.

The parts are so timed that the indicated shuttle will be picked to the drop box side of the loom after its block 30 is thus positioned. The actuating member 43 will then move forward as the indicated shuttle 1s about to be returned-to the single box side of the loom, and the loom stopping mechanism will stop the loom with the lay approaching front center, and with the substantially exhausted shuttle at the single box side of the loom, which is the most convenient point at which to remove and replace a shuttle.

If the boxes are changed before the. indicated shuttle returns to the single box side of the loom, the slide 22 will be raised or lowered so that the block30 or 31 corresponding tothe exhausted shuttle will no longer -be aligned with the actuating member 43, although the block will be held in its indicated or operative position by engagement ofits notch 32 with the rib 21 at the side of the stand 20. The actuating member 43 will thus remain inoperative until the boxes are again shifted to bring the exhausted shuttle to running position.. Such movement will raise or lower the slide 22, returning the indicated block 3 0 or 31 toposition for engagement by the actuating member 43 which will thereuponstop the loom.

exhaustion until the indicated shuttle is about to be returned to the single box side of the loom. Obviously the invention .could be adapted to three or more shuttles by adding more indicating blocks onthe slide 22.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details .herein disclosed otherwise than as set forth in the claims, but what we claim is :e-

1. In a loom having a plurality of drop boxes atvone side of theloom and a single box at the other side, in combination, a weft detector, loom stopping mechanism, an actuator for said stopping mechanism, .an indicating element for each shuttle effective to render said actuator operative to stop kthe loom, and connections wherebysaid. elements are operatively positioned by saidweft detector.

2. In a loom having a plurality of dro-p boxes at one side of the loom Vand asingle box at the other side, in combination, a weft detector, loom stopping mechanism, an ,actuloom, connections whereby said elements are operatively positioned by saidweft detector,

and means to hold an indication of weft exhaustion until the exhausted shuttlereturns to running position. Y

3. In a loom having a plurality of drop boxes at one side of the loom and a single box at the other side, in combination, a weft detector at the single box end of the loom,

and loom stopping mechanism controlled thereby, said stopping mechanism being effective to stop the loom on the iirst return of the indicated shuttle to the single box side of the loom after indication ot weft exhaustion, said mechanism being held inoperative with respect to said indica-ted shuttle until such return thereof.

4. In a loom having a. plurality of drop boxes at one side of the loom and a single box at the other side, in combination, a weft detector, loom stopping mechanism, an actuator for said stopping mechanism, and connections between said actuator and said stopping mechanism controlled by said detector and also controlled in definite relation to the movements of the dropl boxes.

5. The combination in a. loom as set forth in claim 4, in which said connections include a separate indicating element for each shuttle, selectively positioned by said weft detector.

6. The combination in a loom as set forth in claim 4, in which said connections include a separate indicating element for each shuttle selectively positioned by said weft detector, and a movable support for said indicating elements, movable in delinite relation to the movements of the drop boxes.

7. The combination in a loom as set forth in claim 4, in which said connections include a separate indicating element for each shuttle, selectively positioned by said weft detector, and means to reset said'indicating element to inoperative position as the loom is stopped.

8. The combination in a loom as set forth in claim 4, in which said connections' include a separate indicating element for each shuttle, selectively positioned by said weft detector, and means to retain said indicated element in operative position until the loom is stopped. Y

9. In a loom having a plurality of drop boxes at one side of the loom and a single box at the other side, in combnation, a weft detector, loom stopping mechanism, an actuator for said stopping mechanism, and connections between said actuator and said stopping mechanism controlled by said detector and also controlled in definite relation to the movements of the drop boxes, through which connections the loom is stopped only upon the return of the indicated shuttle to the single box side of the loom.

10. In a loom having a plurality of drop boxes at one side. of the loom and a single box at the other side, in combination, a. weft detector mounted at the singleI box side of the loom, loom stopping mechanism, an actuator, a pivoted slide mounted in the path of the actuator, and indicating elements transversely movable in said pivoted slide, said elements being selectively moved to position to render said actuator operative upon indication of substantial weft exhaustion in the corresponding shuttle.

11. In a loom having a plurality of drop boxes at one side of the loom and a single box at the other side, in combination, aweft detector, loom stopping` mechanism, a. member connected therewith and mounted for vertical adjustment in accordance with the movements of the drop boxes. indicating elemen-ts therein controlled by the weft detector, and an actuator rendered effective by said indicating elements to move said member and stop the loom when one of said indicating elements is placed in operative position.

l2. In a loom having a plurality of drop boxes at one side of the loom and a single boxv at the other side, in combination, a weft detector at the single box side of the loom, mechanism effective to stop the loom upon return of the indicated shuttle to the single box side of the loom, and means controlled in delinite relation to the movements of the drop boxes effective to delay the operation of said stopping mechanism until said indicated shuttle returns to said single box.

In 'testimony whereof we ha-ve'hereunto atlixed our signatures.

VICTOR I-I. JENNINGS. HERBERT H. WATSON. 

